Brush



BRUSH c. E. FRos`T Feb. 5', 1935.

Filed' oct. 14, 1930 Patented Feb. 5, 1935 UNITED STATES PATENT oEFicE 1,990,025 BRUSH Application october 14,1990, serial No. 488,589 10 claims. (o1. 15,-181) This invention relates to an improved-brush of the type generally known in the art as sectional brushes, in which a number of disc-like sections are arranged in axial alinement and clamped together, the entire assembly producing a cylindrical brush adapted to be rotated by a machine, for many types of cleaning, polishing and the like.

An object of the invention is to provide an improved circular'brush. Another object is to provide an improved brush' in which the laments will be uniformly distributed. Another' object is to provide an improved brush which may be easily and economically manufactured. Another object is to provide an improved brush which may be used in either vegetable fiber or metal filaments.

Other objects will hereinafter appear.

The invention will'be better understood from the description of threepractical embodiments thereof illustrated in the accompanying drawing, in which:

Figure 1 is a central sectional view of the component parts of one form of brush embodying the invention, parts being spaced apart to show their relationship Figure 2 is a fragmentary view of the parts of Figure 1 in assembled position before the final closing operation;

Figure 3 is a view si the finished brush;

Figures 4 and 5 are Views similar to Figures 1 and 2 of a modied form of construction; and

Figures 6 and '7 are views similar to Figures 1 and 2 of another modification.

In the embodiment shown in Figures 1 to 3, the Vbrush consists of annularly arranged series of looped filaments 1 through the loops of which passes a central ring or wire 2. A retaining ring 3 is provided with outwardly extending lugs 4 each of which has an inwardly directed prong 5 at its end, IIwo side plates, each having a central flat circular portion 6 and a marginallinclined iiange 7, are provided, the plates being apertured centrally as at 8 for the reception of a shaft or arbor upon which the device, when iinished, may be mounted.

In assembling the device, the plates are placed with their circular portions in contact as illustrated in Figure 2 and joined as by spot welding 9. The ring 3 is then placed within the troughshaped peripheral groove formed by the flanges 7. The ring 3 is conveniently simply a strip of sheet metal formed as shown, the ends of which are not united, so that it may be wrapped around within the groove. The looped iilaments are in- 'lar to Figure 2 Yshowing serted in tufts in the trough-shaped groove between the flanges '7` and the wire ring 2 is passed or wound about the periphery of the device in the bottoms ofthe loops.

-The assembled structure is next subjected to pressure by means ofsuitable dies, so that the anges 7 are flattened asv shown in Figure 3, tightly clamping the filaments and lugs 4 between them. The prongs 5 are pressed into the mass of filaments and, if longer than the distance between the anges '7will be clinched over the prongs as will be readily apparent, firmly locking the wire ring between them and the bottom of the groove, and so retaining the filaments against both radial and circumferential displacement, the retention being greatly assisted by the large amount of friction due to the pressure of the iianges 7.

v The clinching of the ends of the prongs is not essential to the proper retention of the laments and wire ring, but does not impair the firm retention of these elements. It is, therefore, possible to use a single length ofv prong for brushes of different thicknesses, the prongs bending over in the case of the narrower brushes but lying straight in the case of the wider sections. This permits sections to be produced of much greater thickness than has been possible heretofore, lls of an inch or more in thickness being firmly retained.

By the invention above described, a brush or section is produced which is better balanced than prior sections, is easier and more economical to manufacture'retains the filaments better, and in which, due to thicker lls, requires less sections for a given length of assembled brush.

In the embodiment of Figures 4 and 5, the filaments, the wire ring and retaining ring are identical to those above described, but one of the side plates 10 has struck from it a series of lugs 11 positioned near the edge of the flat circular portion of the plate, and the other plate 12 has corresponding periorations 13 through which these lugs may pass. Instead of the plates being welded together, the .lugs are passed through the perforations and clinched, as illustrated at 14, after which the parts are assembled and pressed into finished position, as above described.

The embodiment illustrated in Figures 6 and 'l is intended for use in apparatus where the central portion of the hub is unnecessary and the side plates are therefore shown merely as consisting of the inclined flanges 15, similar to those above described, and short inwardly directed flanges by which they are clamped together. On one of these rings, the inwardly directed flange 16 is fiat, while on the other a flat iiange 17 is provided with an axially extending portion 18 which may be passed through the opening Within the flange 16. After the portion 18 has been passed through this opening, its edge is rolled over, as indicated at 19 in Figure 7, iirmly locking the parts together, after which the laments are inserted and the anges 15 attened, as above described.

While I have described the illustrated embodiments of my invention in some particularity, this is done by way of illustration only, it being obvious that many other embodiments will readily occur to those skilled in this art, and I do not, therefore, limit myself to the precise details shown and described, but claim as my invention all embodiments, variations and modifications coming within the scope of the subjoined claims.

I claim:

l. The method of forming a circular brush which comprises forming a generally sheaveshaped sheet metal supporting member having diverging peripheral iianges, positioning a retaining ring in the peripheral groove thereof, the ring having outwardly diverging pronged lugs along its edges, positioning the looped portion of a plurality of vtufts of iilaments within the groove and between the lugs, arranging a ring Within the loops of said iilaments, and then subjecting the assembled device to lateral pressure to compress the diverging iianges of the supporting member tightly upon the mass of laments, and to simultaneously cause the prongs to penetrate said mass of filaments and overlie said second ring.

2. A circular brush comprising a series of annularly arranged looped iilaments with the loops centrally disposed, a ring passing through the loops, a pronged retaining member the prongs of which have broad surfaces which lie in planes which include the axis or the brush and penetrate the mass of filaments beyond said ring, and a supporting hub comprising two disc-shaped members having oiTset marginal ianges embracing the sides of the retaining member and iilaments, the central. portions of said members being secured together.

3. A circular brush comprising a series of annularly arranged looped iiai'nents with the loops centrally disposed, a ring passing through said loops. a retaining member having iiat prongs which lie in planes which include the axis of the brush and penetrate the mass of filaments beyond said ring, and a supporting hub comprising two members having iiat circular central flanges and onset marginal flanges embracing the sides of the retaining member and filaments, the central flange of one of said members being rolled over that of the other to lock said members together.

4. A circular brush comprising a series of annularly arranged looped filaments with the loops centrally disposed, a ring passing through the loops, a retaining member provided with flat prongs which penetrate the mass of laments beyond said ring, and a supporting hub comprising two disc-shaped members having oiset marginal iianges embracing the side of the retaining member and filament, the central portion of said disc-shaped members being secured together.

5. In a circular brush having generally radially disposed filaments and a supporting hub, an integral sheet metal retaining member comprising a strip formed into a ring, lugs projecting from the sides of said strip and provided with prongs projecting substantially in planes that include the axis of the ring.

6. In a circular brush having circularly arranged generally radially extending filaments and a supporting hub, a retaining member comprising a strip of sheet metal formed into a ring, generally L-shaped lugs projecting from the sides of and integral with said strip and bent to form converging prongs.

7. A circular brush comprising an annularly arranged series of looped iilaments With the loops centrally disposed, a ring passing through the said loops, a retaining member comprising a central ring-like portion lying within the said loops and having extending lugs terminating in prongs lying in planes including the axis of the brush and which extend into the mass of iilaments above said ring from opposite sides of the mass, f

and a substantially sheave-shaped supporting member.

8. A circular brush comprising an annularly arranged series of looped iilaments with the loops centrally disposed, a ring passing through the loops of said laments, a generally sheaveshaped supporting member clamping said lilaents between its circumferential flanges, and a retaining member Within said supporting member having intermittently arranged extensions embracing the sides of said mass of laments, said extensions having prongs penetrating said mass of filaments from opposite sides.

9. A circularbrush comprising an annularly arranged series of looped filaments with the loops centrally disposed, a ring passing through the said loops, a retaining member comprising a oentral ring-like portion lying Within the said loops and having laterally extending lugs terminating in prongs penetrating the mass of iilaments above said ring from opposite sides of said mass, and a substantially sheave-shaped supporting member.

10. A circular brush comprising an annularly arranged series of looped filaments with the loops f centrally disposed, a ring passing through the loops of said filaments, a retaining member comprising a plurality of lugs having prongs lying in planes including the axis of the brush and penetrating the mass of filaments from opposite sides and overlying said ring, and a generally sheave-shaped supporting member clamping said retaining member, ring and laments between its circumferential Iianges.

CLINTON E. FROST. 

